通过胺化反应和原子转移自由基聚合(ATRP),合成了以β-环糊精(CD)为"核",以1条聚乙二醇(MPEG)和2~4条聚N-异丙基丙烯酰胺为"臂"的双亲水性星型杂臂聚合物(MPEG-CD-PNIPAMx).通过1 H NMR、13 C NMR和凝胶渗透色谱/...通过胺化反应和原子转移自由基聚合(ATRP),合成了以β-环糊精(CD)为"核",以1条聚乙二醇(MPEG)和2~4条聚N-异丙基丙烯酰胺为"臂"的双亲水性星型杂臂聚合物(MPEG-CD-PNIPAMx).通过1 H NMR、13 C NMR和凝胶渗透色谱/多角度激光光散射联用(SEC/MALLS)对其结构进行了表征.对1 H NMR峰面积积分计算得到聚N-异丙基丙烯酰胺"臂"数为2~4个.通过紫外-可见分光光度计测得该星型大分子的低溶液临界温度(LCST)为37℃.MPEG-CD-PNIPAMx在其水溶液温度达到LCST以上时呈现两亲性,并通过疏水相互作用自组装成以聚N-异丙基丙烯酰胺为"核",以β-环糊精及聚乙二醇为"壳"的纳米级胶束粒子.通过测定MPEG-CD-PNIPAMx及其胶束粒子在芘溶液中的荧光光谱,发现胶束粒子对疏水性客体小分子的包合可发生在壳层的β-环糊精疏水性空腔和胶束粒子的疏水性内核中.展开更多
A one dimensional coordination polymer, [(C7H18N)(Ag2I3)]n((C7H18N)+=Methyltriethylammonium) has been successfully synthesized and characterized by X-ray single-crystal diffraction method. Structure analysis shows tha...A one dimensional coordination polymer, [(C7H18N)(Ag2I3)]n((C7H18N)+=Methyltriethylammonium) has been successfully synthesized and characterized by X-ray single-crystal diffraction method. Structure analysis shows that the compound consists of organic cations(Methyltriethylammonium) and inorganic anion chains (Ag2I3)n-. The inorganic moiety consists of AgI4 tetrahedron, which shares the same edges with adjacent AgI4 tetrahedrons to form one-dimensional infinite double chains along a-axis. There exists weak interaction among Ag…Ag atoms in the crystal. Anion chains are surrounded by Methyltriethylammonium cations. Anion chains and cations are in combination with each other by static attracting forces in the crystal to form so-called organic-inorganic hybrid structure. According to the crystal structure data, quantum chemistry calculation with DFT on B3LYP level was used to reveal the electronic structure of title compound. CCDC: 254288.展开更多
文摘通过胺化反应和原子转移自由基聚合(ATRP),合成了以β-环糊精(CD)为"核",以1条聚乙二醇(MPEG)和2~4条聚N-异丙基丙烯酰胺为"臂"的双亲水性星型杂臂聚合物(MPEG-CD-PNIPAMx).通过1 H NMR、13 C NMR和凝胶渗透色谱/多角度激光光散射联用(SEC/MALLS)对其结构进行了表征.对1 H NMR峰面积积分计算得到聚N-异丙基丙烯酰胺"臂"数为2~4个.通过紫外-可见分光光度计测得该星型大分子的低溶液临界温度(LCST)为37℃.MPEG-CD-PNIPAMx在其水溶液温度达到LCST以上时呈现两亲性,并通过疏水相互作用自组装成以聚N-异丙基丙烯酰胺为"核",以β-环糊精及聚乙二醇为"壳"的纳米级胶束粒子.通过测定MPEG-CD-PNIPAMx及其胶束粒子在芘溶液中的荧光光谱,发现胶束粒子对疏水性客体小分子的包合可发生在壳层的β-环糊精疏水性空腔和胶束粒子的疏水性内核中.
文摘A one dimensional coordination polymer, [(C7H18N)(Ag2I3)]n((C7H18N)+=Methyltriethylammonium) has been successfully synthesized and characterized by X-ray single-crystal diffraction method. Structure analysis shows that the compound consists of organic cations(Methyltriethylammonium) and inorganic anion chains (Ag2I3)n-. The inorganic moiety consists of AgI4 tetrahedron, which shares the same edges with adjacent AgI4 tetrahedrons to form one-dimensional infinite double chains along a-axis. There exists weak interaction among Ag…Ag atoms in the crystal. Anion chains are surrounded by Methyltriethylammonium cations. Anion chains and cations are in combination with each other by static attracting forces in the crystal to form so-called organic-inorganic hybrid structure. According to the crystal structure data, quantum chemistry calculation with DFT on B3LYP level was used to reveal the electronic structure of title compound. CCDC: 254288.